Are you hitting adjacent strings?

If you find that you are accidentally hitting adjacent strings when you play, the two most likely reasons are:

You may be changing the angle of your right arm during the bow stroke. When playing on one string, the angle of your right arm relative to your body should stay constant throughout each up and down bow-stroke– only change the angle of your arm when you want to move to a different string (see Chapter 5, page 30, of Violinworks Book 1, and the ‘Bowing on all the strings’ video ).